A320864 Powers of 2 with initial digit 8.

8, 8192, 8388608, 8589934592, 8796093022208, 81129638414606681695789005144064, 83076749736557242056487941267521536, 85070591730234615865843651857942052864, 87112285931760246646623899502532662132736, 89202980794122492566142873090593446023921664

Offset: 1

Author

Muniru A Asiru, Nov 21 2018

Keywords

• base
• nonn

Links

• Muniru A Asiru, Table of n, a(n) for n = 1..170
• Index to divisibility sequences

Crossrefs

Cf. A000079 (powers of 2), A008952 (leading digit of 2^n), A217401 (numbers starting with 8).

Powers of 2 with initial digit k, (k = 1..8): A067488, A067480, A320859, A320860, A320861, A320862, A320863, this sequence.

Programs

GAP

Filtered(List([0..200],n->2^n),i->ListOfDigits(i)[1]=8);

Maple

select(x->"8"=""||x[1],[2^n$n=0..200])[];

Mathematica

Select[2^Range[200], IntegerDigits[#][[1]] == 8 &] (* Amiram Eldar, Nov 21 2018 *)

PARI

select(x->(digits(x)[1]==8), vector(200, n, 2^n)) \\ Michel Marcus, Nov 21 2018